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Normal operating temp for a 2000

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Old Nov 22, 2007 | 09:07 PM
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Default Normal operating temp for a 2000

I just bought a 2000 stock black 6 speed. It runs like new and sounds great. The previous owner kept it in good shape and cut out the top of the air intake.

The operating temp is between 189-190 under normal conditions. It runs great here in the desert where the temp has been 75-90. This seems low which is probably good. I am not complaining but want to know why.

Did the previous owner change the thermostat??? It looks like the stock radiator so is this normal?

Also, will an air intake make any real difference? I was thinking about getting one of them an d read that they are all similar.
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Old Nov 22, 2007 | 09:41 PM
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You're running great temp. Enjoy!
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Old Nov 22, 2007 | 09:45 PM
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Should have mentioned that a thermo swap will not reduce engine temp; opens the thermo sooner, that's all. take a pic of the cut out; I'm curious. Thanks
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Old Nov 23, 2007 | 12:39 AM
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Originally Posted by MagRedConv
Should have mentioned that a thermo swap will not reduce engine temp
Care to elaborate?
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Old Nov 23, 2007 | 02:11 AM
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Originally Posted by MagRedConv
You're running great temp. Enjoy!


I'd say for your climate your cooling system is performing well.

Most of your after-market air intake systems are similar in
performance gains,a few offer greater HP gains than the rest.

Most of these gains are realized however when the car is
moving at a considerable speed.

It will enable you to keep your car running cooler and breathing
easier just not around town driving.

If anyone else cares to chime in I'm all ears,God knows
I'm no expert.

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Old Nov 23, 2007 | 02:32 AM
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Originally Posted by ericshu
I just bought a 2000 stock black 6 speed. It runs like new and sounds great. The previous owner kept it in good shape and cut out the top of the air intake.

The operating temp is between 189-190 under normal conditions. It runs great here in the desert where the temp has been 75-90. This seems low which is probably good. I am not complaining but want to know why.

Did the previous owner change the thermostat??? It looks like the stock radiator so is this normal?

Also, will an air intake make any real difference? I was thinking about getting one of them an d read that they are all similar.
The PO may have had the fans re-programmed. Those temps are definitely lower than factory.
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Old Nov 23, 2007 | 02:35 AM
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Originally Posted by MagRedConv
Should have mentioned that a thermo swap will not reduce engine temp; opens the thermo sooner, that's all. take a pic of the cut out; I'm curious. Thanks
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Old Nov 23, 2007 | 09:06 AM
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Pic's we love pic's
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Old Nov 23, 2007 | 09:28 AM
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Originally Posted by knowledgefreak
When I bought my 00-C5 recently, I was told to swap out the stock thermo by my brother who's been a Corvette owner (SleeperC5) for a long time and put in a 160T-Stat and immediately saw the difference. Usually cruising at 80-85, temp stayed in that range 189-190, and even approached 200+ in city stop and go traffic, now with the 160T, highway cruising 80-85mph, stays in the 176-78 range, city driving in the 190 range. Tuner lower fan operation when I had my street-tune. Makes sense?
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Old Nov 23, 2007 | 10:14 AM
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I have a 99, A-4 and the #s look like this. 2hrs of driving on I-75 in southern FL. 80 mph 85 drgrees.

Oil temp--210*
Trans--192*
Water--187*
Oil Presure--43

Yours sounds about right
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Old Nov 24, 2007 | 01:18 AM
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Originally Posted by MagRedConv
Should have mentioned that a thermo swap will not reduce engine temp; opens the thermo sooner, that's all. take a pic of the cut out; I'm curious. Thanks
Originally Posted by knowledgefreak
OK, do you care to elaborate?
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Old Nov 24, 2007 | 02:47 AM
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Originally Posted by 2000C-5
OK, do you care to elaborate?


nah just messin
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Old Nov 24, 2007 | 04:43 AM
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Originally Posted by 2000C-5
Care to elaborate?
The thermostat only controls when coolant starts flowing through the engine. The max temp of a Vette system is determined by radiator size and fan activation temps. At highway speed at low to moderate temps, a C5 with a 160 deg stat might run in the 170-180 range versus stock of 190-200. However, in stop and go traffic, due to lack of airflow through the radiator, the temps will still keep rising until the fans are activated, which is on low speed at about 226 and on high at 235 (stock.) Lowering the fan temps will keep the max temps lower at near stock power levels. However, if horsepower has been increased significantly (stroker, FI, etc) or in extremely hot temps (like AZ or NV) even that may not keep the system cool, requiring a high capacity radiator.
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Old Nov 24, 2007 | 05:29 AM
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Wow what a great site!!! thanks for the info on the temps of the C-5. I have had mine for 5 yrs and NEVER realized how hot it ran till I took a 600 mile trip in one day. I live on the outer banks of NC and ALWAYS use the AC. This past Thanksgiving Week I had to take a quick trip out of state and because of the cool temps up north, I did not use my AC. The engine temps sored (225) in city driving. I was very concerned. Only when I turned on the AC/Defroster because of the need to defrost my windshield did I put it together that the fans RUN the moment you put the AC on and allows the engine to run cooler. Do you think it is neccessary to put in a lower Thermostat and have the adjustment made to the computer to allow the engine to run cooler. I have always thought, Heat was bad for an engine. Thanks
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Old Nov 24, 2007 | 08:51 AM
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Originally Posted by obxchartercaptain
Wow what a great site!!! thanks for the info on the temps of the C-5. I have had mine for 5 yrs and NEVER realized how hot it ran till I took a 600 mile trip in one day. I live on the outer banks of NC and ALWAYS use the AC. This past Thanksgiving Week I had to take a quick trip out of state and because of the cool temps up north, I did not use my AC. The engine temps sored (225) in city driving. I was very concerned. Only when I turned on the AC/Defroster because of the need to defrost my windshield did I put it together that the fans RUN the moment you put the AC on and allows the engine to run cooler. Do you think it is neccessary to put in a lower Thermostat and have the adjustment made to the computer to allow the engine to run cooler. I have always thought, Heat was bad for an engine. Thanks
Your system is running just as GM designed it. The aluminum blocks operate at a higher temperature, they are designed to do this. Most of this was designed for emissions. If you run too cool, you will get water and contaiminents in your oil and decrease the life of your engine. You need to get to 200 - 212 F to burn off these.
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Old Nov 24, 2007 | 02:54 PM
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Originally Posted by knowledgefreak


nah just messin


Originally Posted by fdxpilot
The thermostat only controls when coolant starts flowing through the engine.
Right.

Originally Posted by fdxpilot
The max temp of a Vette system is determined by radiator size and fan activation temps. At highway speed at low to moderate temps, a C5 with a 160 deg stat might run in the 170-180 range versus stock of 190-200. However, in stop and go traffic, due to lack of airflow through the radiator, the temps will still keep rising until the fans are activated, which is on low speed at about 226 and on high at 235 (stock.)
I agree, but on an average drive, you usually spend much more time at highway speeds than in stop and go traffic, unless you only drive back and forth to work and spend all your time in rush hour traffic. Overall, your engine temps will be lower.


Originally Posted by fdxpilot
Lowering the fan temps will keep the max temps lower at near stock power levels.
I agree this is the correct way to do it, but spending the money for a tune just to lower the fans is not money well spent. Installing a lower thermostat will still lower engine temps for the majority of the time. With a 160* stat, my car runs ~178* - 180* and I have my first fan set to come on at 185*, but they very seldom come on, even in moderate stop and go traffic. If it is even somewhat warm outside, most people have their A/C on which turns on both fans, this, in turn, pulls air across the radiator, keeping the coolant temps at the lower thermostat temps. About the only time air would not be going across the radiator would be in outside temperatures that are too cool to run the A/C and you are in rush hour, stop and go traffic. Make sense? I'm just throwing this out there for the sake of argument.
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Old Nov 24, 2007 | 11:49 PM
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That temp sounds right to me. It matches my 2000 6-speed.
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Old Nov 25, 2007 | 09:43 AM
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Originally Posted by ericshu
I just bought a 2000 stock black 6 speed. It runs like new and sounds great. The previous owner kept it in good shape and cut out the top of the air intake.

The operating temp is between 189-190 under normal conditions. It runs great here in the desert where the temp has been 75-90. This seems low which is probably good. I am not complaining but want to know why.

Did the previous owner change the thermostat??? It looks like the stock radiator so is this normal?

Also, will an air intake make any real difference? I was thinking about getting one of them an d read that they are all similar.

I found the original owner's name in the manual. I am calling him next week to se what he did. It will be interesting to see what he did versus what we suspected.

This forum rocks!!!
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Old Nov 25, 2007 | 01:46 PM
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Odd, I never get over 190... I hover right between 189 and 190.... I was searching for this because the other night it was cold (12 degrees) here and sitting idle in a parking lot for 20 min with the heat on caused it to bump up over 220, the fans didn't kick on yet but I had a nasty coolant-burning smell and was afriad something got tooo hot, perhaps it was just burning a bit of the extras off.
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Old Nov 25, 2007 | 09:57 PM
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Originally Posted by iced98lx
Odd, I never get over 190... I hover right between 189 and 190.... I was searching for this because the other night it was cold (12 degrees) here and sitting idle in a parking lot for 20 min with the heat on caused it to bump up over 220, the fans didn't kick on yet but I had a nasty coolant-burning smell and was afriad something got tooo hot, perhaps it was just burning a bit of the extras off.
If your car never gets over 190 F and you smelled burnt coolant, you could have a leak or a bad radiator cap. You must develop over 1 atmosphere presure to get over 212 F, the C5 radiator cap is designed to operate at 2 atmospheres (15 psi gauge).

Check your coolant color by sucking some out with a turkey baster. It should be pink. If it is muddy red or brown, you need to flush it and change it. Dexcool does not like air leaks, it turns muddy and thick.
Find your air leak first. Look for coolant leaks, they leave white residue.
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